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Layer 3-based vlans, Internet protocols – D-Link DES-3326 User Manual

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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide

VLAN Name

VID

Network Address

IP Address

System (default)

1

10.32.0.0

10.32.0.1

Engineering 2 10.64.0.0

10.64.0.1

Marketing 3

10.96.0.0 10.96.0.1

Finance 4

10.128.0.0

10.128.0.1

Sales 5

10.160.0.0

10.160.0.1

Backbone 6

10.192.0.0 10.192.0.1

Table 5-9. VLAN Example – Assigned IP Addresses

The 6 IP interfaces, each with an IP address (listed in the table above), and a subnet mask of
255.224.0.0 can be entered into the Setup IP Interface menu.

Layer 3-Based VLANs

Layer 3-based VLANs use network-layer addresses (subnet address for TCP/IP) to determine VLAN
membership. These VLANs are based on layer 3 information, but this does not constitute a ‘routing’
function.

The DES-3326 allows an IP subnet to be configured for each 802.1Q VLAN that exists on the switch.

Even though a switch inspects a packet’s IP address to determine VLAN membership, no route
calculation is performed, the RIP protocol is not employed, and packets traversing the switch are
bridged using the Spanning Tree algorithm.

A switch that implements layer 3 (or ‘subnet’) VLANs without performing any routing function between
these VLANs is referred to as performing ‘IP Switching’.

Internet Protocols

This is a brief introduction to the suite of Internet Protocols frequently referred to as TCP/IP. It is
intended to give the reader a reasonable understanding of the available facilities and some familiarity
with terminology. It is not intended to be a complete description.

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